剛剛抽空做了一下MYSQL 的主主同步。把步驟寫(xiě)下來(lái)，至于會(huì)出現(xiàn)的什么問(wèn)題，以后隨時(shí)更新。這里我同步的數(shù)據(jù)庫(kù)是TEST1、環(huán)境描述。主機(jī)：192.168.0.231(A)主機(jī)：192.168.0.232(B)MYSQL 版本為5.1.212、授權(quán)用戶。A：mysql> grant replication slave,file on *.* to 'repl1'@'192.168.0.232' identifiedby '123456';Query OK, 0 rows affected (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)B：mysql> grant replication slave,file on *.* to 'repl2'@'192.168.0.231' identifiedby '123456';Query OK, 0 rows affected (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)然后都停止MYSQL 服務(wù)器。3、配置文件。在兩個(gè)機(jī)器上的my.cnf里面都開(kāi)啟二進(jìn)制日志 。A：user = mysqllog-bin=mysql-binserver-id?????? = 1binlog-do-db=testbinlog-ignore-db=mysqlreplicate-do-db=testreplicate-ignore-db=mysqllog-slave-updatesslave-skip-errors=all

skip-name-resolvesync_binlog=1auto_increment_increment=2auto_increment_offset=1B：user = mysqllog-bin=mysql-binserver-id?????? = 2binlog-do-db=testbinlog-ignore-db=mysqlreplicate-do-db=testreplicate-ignore-db=mysqllog-slave-updatesslave-skip-errors=all

skip-name-resolvesync_binlog=1auto_increment_increment=2auto_increment_offset=2至于這些參數(shù)的說(shuō)明具體看手冊(cè)。紅色的部分非常重要，如果一個(gè)MASTER 掛掉的話，另外一個(gè)馬上接管。紫紅色的部分指的是服務(wù)器頻繁的刷新日志。這個(gè)保證了在其中一臺(tái)掛掉的話，日志刷新到另外一臺(tái)。從而保證了數(shù)據(jù)的同步 。4、重新啟動(dòng)MYSQL服務(wù)器。在A和B上執(zhí)行相同的步驟[root@localhost ~]# /usr/local/mysql/bin/mysqld_safe &[1] 4264[root@localhost ~]# 071213 14:53:20 mysqld_safe Logging to '/usr/local/mysql/data/localhost.localdomain.err'./usr/local/mysql/bin/mysqld_safe: line 366: [: -eq: unary operator expected071213 14:53:20 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data5、進(jìn)入MYSQL的SHELL。A：mysql> flush tables with read lock\GQuery OK, 0 rows affected (0.00 sec)mysql> show master status\G*************************** 1. row ***************************File: mysql-bin.000007Position: 528Binlog_Do_DB: testBinlog_Ignore_DB: mysql1 row in set (0.00 sec)B：mysql> flush tables with read lock;Query OK, 0 rows affected (0.00 sec)mysql> show master status\G*************************** 1. row ***************************File: mysql-bin.000004Position: 595Binlog_Do_DB: testBinlog_Ignore_DB: mysql1 row in set (0.00 sec)然后備份自己的數(shù)據(jù)，保持兩個(gè)機(jī)器的數(shù)據(jù)一致。方法很多。完了后看下一步。6、在各自機(jī)器上執(zhí)行CHANGE MASTER TO命令。A：mysql> change master to-> master_host='192.168.0.232',-> master_user='repl2',-> master_password='123456',-> master_log_file='mysql-bin.000004',-> master_log_pos=595;Query OK, 0 rows affected (0.01 sec)mysql> start slave;Query OK, 0 rows affected (0.00 sec)B：mysql> change master to-> master_host='192.168.0.231',-> master_user='repl1',-> master_password='123456',-> master_log_file='mysql-bin.000007',-> master_log_pos=528;Query OK, 0 rows affected (0.01 sec)mysql> start slave;Query OK, 0 rows affected (0.00 sec)7、查看各自機(jī)器上的IO進(jìn)程和 SLAVE進(jìn)程是否都開(kāi)啟。A：mysql> show processlist\G*************************** 1. row ***************************Id: 2User: replHost: 192.168.0.232:54475db: NULLCommand: Binlog DumpTime: 1590State: Has sent all binlog to slave; waiting for binlog to be updatedInfo: NULL*************************** 2. row ***************************Id: 3User: system userHost:db: NULLCommand: ConnectTime: 1350State: Waiting for master to send eventInfo: NULL*************************** 3. row ***************************Id: 4User: system userHost:db: NULLCommand: ConnectTime: 1149State: Has read all relay log; waiting for the slave I/O thread to update itInfo: NULL*************************** 4. row ***************************Id: 5User: rootHost: localhostdb: testCommand: QueryTime: 0State: NULLInfo: show processlist4 rows in set (0.00 sec)B：mysql> show processlist\G*************************** 1. row ***************************Id: 1User: system userHost:db: NULLCommand: ConnectTime: 2130State: Waiting for master to send eventInfo: NULL*************************** 2. row ***************************Id: 2User: system userHost:db: NULLCommand: ConnectTime: 1223State: Has read all relay log; waiting for the slave I/O thread to update itInfo: NULL*************************** 3. row ***************************Id: 4User: rootHost: localhostdb: testCommand: QueryTime: 0State: NULLInfo: show processlist*************************** 4. row ***************************Id: 5User: repl2Host: 192.168.0.231:50718db: NULLCommand: Binlog DumpTime: 1398State: Has sent all binlog to slave; waiting for binlog to be updatedInfo: NULL4 rows in set (0.00 sec)如果紅色部分沒(méi)有出現(xiàn)，檢查DATA目錄下的錯(cuò)誤文件。8、釋放掉各自的鎖，然后進(jìn)行插數(shù)據(jù)測(cè)試。mysql> unlock tables;Query OK, 0 rows affected (0.00 sec)插入之前兩個(gè)機(jī)器表的對(duì)比：A：mysql> show tables;+----------------+| Tables_in_test |+----------------+| t11_innodb???? || t22??????????? |+----------------+B：mysql> show tables;+----------------+| Tables_in_test |+----------------+| t11_innodb???? || t22??????????? |+----------------+從A機(jī)器上進(jìn)行插入A：mysql> create table t11_replicas-> (id int not null auto_increment primary key,-> str varchar(255) not null) engine myisam;Query OK, 0 rows affected (0.01 sec)mysql> insert into t11_replicas(str) values-> ('This is a master to master test table');Query OK, 1 row affected (0.01 sec)mysql> show tables;+----------------+| Tables_in_test |+----------------+| t11_innodb???? || t11_replicas?? || t22??????????? |+----------------+3 rows in set (0.00 sec)mysql> select * from t11_replicas;+----+---------------------------------------+| id | str?????????????????????????????????? |+----+---------------------------------------+|? 1 | This is a master to master test table |+----+---------------------------------------+1 row in set (0.00 sec)現(xiàn)在來(lái)看B機(jī)器：mysql> show tables;+----------------+| Tables_in_test |+----------------+| t11_innodb???? || t11_replicas?? || t22??????????? |+----------------+3 rows in set (0.00 sec)mysql> select * from t11_replicas;+----+---------------------------------------+| id | str?????????????????????????????????? |+----+---------------------------------------+|? 1 | This is a master to master test table |+----+---------------------------------------+1 row in set (0.00 sec)現(xiàn)在反過(guò)來(lái)從B機(jī)器上插入數(shù)據(jù)：B：mysql> insert into t11_replicas(str) values('This is a test 2');Query OK, 1 row affected (0.00 sec)mysql> select * from t11_replicas;+----+---------------------------------------+| id | str?????????????????????????????????? |+----+---------------------------------------+|? 1 | This is a master to master test table ||? 2 | This is a test 2????????????????????? |+----+---------------------------------------+2 rows in set (0.00 sec)我們來(lái)看AA：mysql> select * from t11_replicas;+----+---------------------------------------+| id | str?????????????????????????????????? |+----+---------------------------------------+|? 1 | This is a master to master test table ||? 2 | This is a test 2????????????????????? |+----+---------------------------------------+2 rows in set (0.00 sec)好了。現(xiàn)在兩個(gè)表互相為MASTER。

本文標(biāo)題: MySQL雙Master配置的方法詳解

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